| Cover Page | 9 Months Ended |
| Sep. 30, 2022 | |
| Cover [Abstract] | |
| Document Type | 6-K |
| Entity File Number | 001-40377 |
| Entity Registrant Name | Valneva SE |
| Amendment Flag | false |
| Entity Central Index Key | 0001836564 |
| Current Fiscal Year End Date | --12-31 |
| Document Period End Date | Sep. 30, 2022 |
| Document Fiscal Year Focus | 2022 |
| Document Fiscal Period Focus | Q3 |
| Unaudited Interim Condensed Consolidated Statements of Income (Loss) - EUR (€) € in Thousands | 9 Months Ended | |
| Sep. 30, 2022 | Sep. 30, 2021 | |
| Profit or loss [abstract] | ||
| Product sales | € 74,421 | € 45,469 |
| Other revenues | 175,481 | 24,379 |
| Revenues | 249,902 | 69,847 |
| Cost of goods and services | (202,726) | (159,586) |
| Research and development expenses | (75,385) | (117,234) |
| Marketing and distribution expenses | (13,089) | (15,000) |
| General and administrative expenses | (23,267) | (31,664) |
| Other income and expenses, net | 7,472 | 16,034 |
| OPERATING LOSS | (57,093) | (237,603) |
| Finance income | 59 | 240 |
| Finance expenses | (13,395) | (12,137) |
| Foreign exchange gain/(loss), net | (26,492) | 5,334 |
| Result from investments in associates | 9 | (120) |
| LOSS BEFORE INCOME TAX | (96,912) | (244,286) |
| Income tax income/(expense) | (2,163) | (1,647) |
| LOSS FOR THE PERIOD | € (99,075) | € (245,933) |
| Earnings per share [abstract] | ||
| Basic loss per share (in euro per share) | € (0.92) | € (2.51) |
| Diluted loss per share (in euro per share) | € (0.92) | € (2.51) |
| Unaudited Interim Condensed Consolidated Statement of Comprehensive Income (Loss) - EUR (€) € in Thousands | 9 Months Ended | |
| Sep. 30, 2022 | Sep. 30, 2021 | |
| Profit or loss [abstract] | ||
| Loss for the period | € (99,075) | € (245,933) |
| Items that may be reclassified to profit or loss | ||
| Currency translation differences | (1,488) | (143) |
| Items that will not be reclassified to profit or loss | ||
| Defined benefit plan actuarial gains/(losses) | 168 | 0 |
| Other comprehensive loss for the period, net of tax | (1,320) | (143) |
| TOTAL COMPREHENSIVE LOSS FOR THE PERIOD ATTRIBUTABLE TO THE OWNERS OF THE COMPANY | € (100,395) | € (246,076) |
| Unaudited Interim Condensed Consolidated Balance Sheets - EUR (€) € in Thousands | Sep. 30, 2022 | Dec. 31, 2021 |
| ASSETS | ||
| Non-current assets | € 221,548 | € 231,520 |
| Intangible assets | 29,652 | 32,700 |
| Right of use assets | 47,679 | 48,285 |
| Property, plant and equipment | 122,980 | 125,545 |
| Investments in associates | 0 | 2,124 |
| Deferred tax assets | 2,943 | 3,582 |
| Other non-current assets | 18,294 | 19,282 |
| Current assets | 476,535 | 585,832 |
| Inventories | 96,462 | 124,098 |
| Trade receivables | 57,732 | 44,013 |
| Other current assets | 59,165 | 71,036 |
| Cash and cash equivalents | 261,042 | 346,686 |
| Assets classified as held for sale | 2,134 | 0 |
| TOTAL ASSETS | 698,083 | 817,352 |
| EQUITY | ||
| Capital and reserves attributable to the Company’s equity holders | 164,983 | 170,581 |
| Share capital | 17,603 | 15,786 |
| Share premium | 501,638 | 409,258 |
| Other reserves | 51,791 | 52,512 |
| Retained earnings/(Accumulated deficit) | (306,974) | (233,549) |
| Loss for the period | (99,075) | (73,425) |
| LIABILITIES | ||
| Non-current liabilities | 158,889 | 277,791 |
| Borrowings | 93,364 | 50,726 |
| Lease liabilities | 52,643 | 53,687 |
| Contract liabilities | 2,974 | 4,741 |
| Refund liabilities | 6,587 | 158,970 |
| Provisions | 1,357 | 8,308 |
| Deferred tax liabilities | 1,784 | 1,290 |
| Other liabilities | 181 | 69 |
| Current liabilities | 374,211 | 368,979 |
| Borrowings | 12,494 | 7,107 |
| Trade payables and accruals | 74,973 | 68,119 |
| Income tax liability | 137 | 83 |
| Tax and Employee-related liabilities | 16,036 | 17,249 |
| Lease liabilities | 3,118 | 3,135 |
| Contract liabilities | 6,906 | 124,017 |
| Refund liabilities | 225,712 | 95,611 |
| Provisions | 27,691 | 48,708 |
| Other liabilities | 7,145 | 4,950 |
| TOTAL LIABILITIES | 533,100 | 646,771 |
| TOTAL EQUITY AND LIABILITIES | € 698,083 | € 817,352 |
| Unaudited Interim Condensed Consolidated Statements of Cash Flows - EUR (€) € in Thousands | 9 Months Ended | |
| Sep. 30, 2022 | Sep. 30, 2021 | |
| Cash flows from operating activities | ||
| Loss for the period | € (99,075) | € (245,933) |
| Adjustments for non-cash transactions | 17,784 | 34,851 |
| Changes in non-current operating assets and liabilities | (155,970) | 4,210 |
| Changes in working capital | 48,830 | 244,948 |
| Cash generated from/(used in) operations | (188,431) | 38,076 |
| Income tax paid | (1,082) | (1,624) |
| Net cash generated from/(used in) operating activities | (189,513) | 36,452 |
| Cash flows from investing activities | ||
| Purchases of property, plant and equipment | (22,465) | (68,973) |
| Purchases of intangible assets | (76) | (938) |
| Interest received | 59 | 45 |
| Net cash used in investing activities | (22,483) | (69,866) |
| Cash flows from financing activities | ||
| Proceeds from issuance of common stock, net of costs of equity transactions | 93,998 | 85,061 |
| Disposal of treasury shares | 0 | 209 |
| Proceeds from borrowings, net of transaction costs | 38,141 | 0 |
| Repayment of borrowings | (1,793) | (1,956) |
| Payment of lease liabilities | (2,171) | (1,948) |
| Interest paid | (6,544) | (6,734) |
| Net cash generated from/(used in) financing activities | 121,631 | 74,632 |
| Net change in cash and cash equivalents | (90,365) | 41,218 |
| Cash and cash equivalents at beginning of the period | 346,642 | 204,394 |
| Exchange gains/(losses) on cash | 1,814 | 2,324 |
| Restricted cash | 2,951 | 43 |
| Cash and cash equivalents at end of the period | € 261,042 | € 247,948 |
| Unaudited Interim Condensed Consolidated Statements of Changes in Equity € in Thousands | EUR (€) | Share capital EUR (€) shares | Share premium EUR (€) | Other reserves EUR (€) | Retained earnings/ (Accumulated deficit) EUR (€) | Profit/ (loss) for the period EUR (€) |
| Number of shares issued at beginning of period (in shares) at Dec. 31, 2020 | shares | 90,970,562 | |||||
| Equity at beginning of period at Dec. 31, 2020 | € 77,422 | € 13,646 | € 244,984 | € 52,342 | € (169,156) | € (64,393) |
| Total comprehensive loss | (246,076) | (143) | (245,933) | |||
| Income appropriation | 0 | (64,393) | 64,393 | |||
| Share-based compensation expense: | ||||||
| Share-based compensation expense, value of services | 1,825 | 1,825 | ||||
| Share-based compensation expense, exercices (in shares) | shares | 799,450 | |||||
| Share-based compensation expense, exercices | 2,225 | € 120 | 2,105 | |||
| Treasury shares | 209 | 209 | ||||
| Issuance of ordinary shares (in shares) | shares | 8,145,176 | |||||
| Issuance of ordinary shares | 89,597 | € 1,222 | 88,375 | |||
| Cost of equity transactions, net of tax | (6,761) | (6,761) | ||||
| Number of shares issued at end of period (in shares) at Sep. 30, 2021 | shares | 99,915,188 | |||||
| Equity at end of period at Sep. 30, 2021 | (81,559) | € 14,987 | 328,703 | 54,234 | (233,549) | (245,933) |
| Number of shares issued at beginning of period (in shares) at Dec. 31, 2021 | shares | 105,239,085 | |||||
| Equity at beginning of period at Dec. 31, 2021 | 170,581 | € 15,786 | 409,258 | 52,512 | (233,549) | (73,425) |
| Total comprehensive loss | (100,395) | (1,320) | (99,075) | |||
| Income appropriation | 0 | (73,425) | 73,425 | |||
| Share-based compensation expense: | ||||||
| Share-based compensation expense, value of services | 599 | 599 | ||||
| Share-based compensation expense, exercices (in shares) | shares | 2,563,011 | |||||
| Share-based compensation expense, exercices | 3,718 | € 384 | 3,333 | |||
| Treasury shares | 0 | |||||
| Issuance of ordinary shares (in shares) | shares | 9,549,761 | |||||
| Issuance of ordinary shares | 90,627 | € 1,432 | 89,195 | |||
| Cost of equity transactions, net of tax | (148) | (148) | ||||
| Number of shares issued at end of period (in shares) at Sep. 30, 2022 | shares | 117,351,857 | |||||
| Equity at end of period at Sep. 30, 2022 | € 164,983 | € 17,603 | € 501,638 | € 51,791 | € (306,974) | € (99,075) |
